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1 Techniques that automatically move program and data blocks into the physical main memory when they are required for execution are calledVirtual Memory techniques

A Associative-Mapping techniques B Main Memory techniques C Virtual Memory techniques D Cache Memory techniques

✅ Correct Answer: 3

2 In which type of flip-flop the indeterminate condition of the SR flip-flop (when S=R=1) is eliminated?T flip-flop

A Edge-triggered flip-flop B JK flip-flop C D flip-flop D T flip-flop

✅ Correct Answer: 2

3 What does T stands for in T flip-flop?

A Top B Type C Toggle D Tickle

✅ Correct Answer: 3

4 What are the major components of a CPU?

A Control Unit Register Set Arithmetic Logic Unit B Control Unit Memory Unit Arithmetic Logic Unit C Memory Unit Arithmetic Logic Unit Auxiliary Memory D Register Set Control Unit Memory Unit

✅ Correct Answer: 1

5 he registers found in the processor unit are

A Operational registers B Memory registers C Binary registers D Storage registers

✅ Correct Answer: 1

6 Given the characteristic table of a JK flip-flop find the missing output value. J K Q(t+1) 0 0 Q(t) 0 1 0 #1 0 1 #1 1 ---

A Q(t) B Q?(t+1) C 1 D Q?(t)

✅ Correct Answer: 4

7 The sum of -6 and -13 using 2?s complement addition is

A 11100011 B 11110011 C 11001100 D 11101101

✅ Correct Answer: 4

8 What is Q when S = 1 and R = 1 for SR flip-flop?Complement of previous output

A No Change B Clear to 0 C Set to 1 D Indeterminate.

✅ Correct Answer: 4

9 The bulk of the binary information in a digital computer is stored in memory but all computations are done in

A Timing Control B Memory Registers C Processor Registers D Program Control

✅ Correct Answer: 3

10 #2?s complement of -13 = 11110011 Add the two numbers in their 2?s complement form including their sign bits and discard any carry out of the sign (leftmost) bit position. So the answer is 11101101 (-19). -6 11111010 -13 11110011 ---------------------- -19 11101101 #6. Which one of the following CPU registers holds the address of the instructions (instructions in the program stored in memory) to be executed next?IR (Instruction Register)

A MAR (Memory address register) B MBR (Memory Buffer Register) C AC (Accumulator) D PC (Program Counter)

✅ Correct Answer: 4

11 .Information transfer from one register to another is designated in symbolic form by means of

A Control Function B Op Code C Registers D Replacement Operator

✅ Correct Answer: 4

12 The simplest way to determine cache locations in which to store memory blocks is the

A Associative Mapping technique B Direct Mapping technique C Set-Associative Mapping technique D Indirect Mapping technique

✅ Correct Answer: 2

13 The CPU nearly delays its operation for one memory cycle to allow direct memory I/O transfer. This process is called

A Burst transfer B Cycle waiting C Cycle stealing D Cycle interrupting

✅ Correct Answer: 3

14 The correspondence between the main memory blocks and those in the cache is specified by

A Mapping function B Replacement algorithm C Hit rate D Miss penalty

✅ Correct Answer: 1

15 To convert octal code to binary code which of the following digital functions should be used?

A Decoder B Encoder C Multiplexer D Demultiplexer

✅ Correct Answer: 1

16 System Software usually includes a program called a -------- which helps the programmer find errors in a program.

A Write Buffer B Read Buffer C Debugger D Both (opt1) and (opt3) above

✅ Correct Answer: 3

17 Which of the following representation requires the least number of bits to store the number +255?

A BCD B 2?s complement C 1?s complement D Unsigned binary

✅ Correct Answer: 4

18 The processor ---------- and I/O Devices are interconnected by means of a common bus. #17. The processor ---------- and I/O Devices are interconnected by means of a common bus.Main Memory

A Cache Memory B Auxiliary Memory C Virtual Memory D Main Memory

✅ Correct Answer: 1

19 Which of the following modes are used to handle data transfer to and from peripherals?

A Programmed I/O B Programmed I/O C Interrupted-initiated I/O D Programmed I/O Interrupted-initiated I/O Direct memory access

✅ Correct Answer: 4

20 The control condition is terminated with

A Comma B Semicolon C Colon D Hash

✅ Correct Answer: 3

21 .Boolean functions expressed as a --------- of minterms or ---------- of maxterms are said to be in a canonical form.

A Product Sum B Sum Product C Subtract Divide D Divide Subtract

✅ Correct Answer: 2

22 A combinational circuit that converts binary information from n input lines to a maximum of unique output lines is

A Decoder B Encoder C Full-adder D None of these

✅ Correct Answer: 1

23 What are the building blocks of combinational circuits?Registers

A Flip-flops B Logical gates C Latches D Full-subtractor

✅ Correct Answer: 2

24 What are the missing values in the truth table of a half-adder given below? x y C S 0 0 -- -- 0 1 0 1 #1 0 0 1 #1 1 1 0

A x B y C 0 D 1

✅ Correct Answer: 3

25 A full-adder is simply a connection of two half-adders joined by

A AND gate B OR gate C NAND gate D NOR gate

✅ Correct Answer: 2

26 he gray code of a given binary number 1001 is

A 1110 B 110 C 1101 D 1111

✅ Correct Answer: 3

27 In which type of flip-flop the indeterminate condition of the SR flip-flop (when S=R=1) is eliminated?

A Edge-triggered flip-flop B JK flip-flop C D flip-flop D T flip-flop

✅ Correct Answer: 2

28 What is Q when S = 1 and R = 1 for SR flip-flop?Set to 1

A No Change B Clear to 0 C Complement of previous output D Indeterminate.

✅ Correct Answer: 4

29 Techniques that automatically move program and data blocks into the physical main memory when they are required for execution are called

A Associative-Mapping techniques B Main Memory techniques C Virtual Memory techniques D Cache Memory techniques

✅ Correct Answer: 3

30 The one major advantage of CMOS is its #34. The one major advantage of CMOS is itsHigh propagation delay

A Low propagation delay B High propagation delay C Very low propagation delay D Very high propagation delay

✅ Correct Answer: 2

31 The registers found in the processor unit are

A Operational registers B Memory registers C Storage registers D Binary registers

✅ Correct Answer: 1

32 Information transfer from one register to another is designated in symbolic form by means of a

A Control Function B Op Code C Registers D Replacement Operator

✅ Correct Answer: 4

33 What are the major components of a CPU?Control Unit Register Set Arithmetic Logic UnitControl Unit Memory Unit Arithmetic Logic Unit

A Control Unit Register Set Arithmetic Logic Unit B Control Unit Memory Unit Arithmetic Logic Unit C Memory Unit Arithmetic Logic Unit Auxiliary Memory D Register Set Control Unit Memory Unit

✅ Correct Answer: 1

34 2?s complement of -13 = 11110011 Add the two numbers in their 2?s complement form including their sign bits and discard any carry out of the sign (leftmost) bit position. So the answer is 11101101 (-19). -6 11111010 -13 11110011 ------------------ -19 11101101 #38. Which one of the following CPU registers holds the address of the instructions (instructions in the program stored in memory) to be executed next?IR (Instruction Register)

A MAR (Memory address register) B MBR (Memory Buffer Register) C AC (Accumulator) D PC (Program Counter).

✅ Correct Answer: 4

35 64K memory contains how many words of 8 bits each?

A 65,536 B 64,536 C 65,436 D 65,546

✅ Correct Answer: 1

36 Consider the following logic function f(ABC). f(ABC) = ( A + B + C?) . (A + B?+ C?) Which of the following would be the result if the above logic function is to be simplified using k-maps?

A C? + A B C + C?A? C C.A? D C?.A

✅ Correct Answer: 1

37 A full-adder is simply a connection of two half-adders joined by a

A AND gate B OR gate C NAND gate D NOR gate

✅ Correct Answer: 2

38 Convert decimal value (888)10 to base-5.(444)5

A (444)5 B (12023)5 C (131313)5 D (12021)5

✅ Correct Answer: 2

39 The correspondence between the main memory blocks and those in the cache is specified by aPage fault

A Miss penalty B Replacement algorithms C Hit rate D Mapping functions.

✅ Correct Answer: 4

40 The transfer of new information into the register is called

A Execution B Loading C Shifting D Configuring

✅ Correct Answer: 2

41 The set of physical addresses is called

A Disk Space B Address Space C Pages D Frames

✅ Correct Answer: 2

42 The DMA transfer technique where transfer of one word data at a time is called

A Cycle stealing B Memory stealing C Hand-shaking D Inter-leaving

✅ Correct Answer: 1

43 The number of 256*4 RAM chips required to construct 2KB CACHE is

A 8 B 2 C 4 D 16

✅ Correct Answer: 4

44 The processor _________ and I/O Devices are interconnected by means of a common bus. #49. The processor _________ and I/O Devices are interconnected by means of a common bus.

A Cache Memory B Auxiliary Memory C Virtual Memory D Main Memory

✅ Correct Answer: 1

45 What are the building blocks of combinational circuits?Registers

A Flip-flops B Logic gates C Latches D Registers

✅ Correct Answer: 2

46 What is the name of device that is allowed to initiate data transfer on the bus?

A Bus Master B Bus Arbitration C Bus Cycle D Bus Request

✅ Correct Answer: 1

47 What interface is used to connect the processor to I/O devices that require transmission of data one bit at a time?

A Parallel B Serial C Output D Input

✅ Correct Answer: 2

48 ystem Software usually includes a program called a _______ which helps the programmer to find errors in a program.

A Write Buffer B Read Buffer C Debugger D Both (opt1) and (opt3) above

✅ Correct Answer: 3

49 What is the purpose of RAID system?

A It increases the processor speed B It increases the disk storage capacity C It increases the disk storage capacity and availability D It increases operating system efficiency

✅ Correct Answer: 3

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