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Home » Engineering » Computer Science » Aptitude Test - 34
1.In a generic microprocessor instruction cycle time is
A. Shorter than machine cycle time
B. Larger than machine cycle time
C. Ten times the machine cycle time
D. Shorter than machine cycle time
2. The stack pointer in the microprocessor is a
A. 16 bit register that point to stack memory locations
B. 32 bit accumulator
C. memory location in the stack
D. 16 bit register that point to stack memory locations
3.If we use 3 bits in the instruction word to indicate if an index register is to be used and if necessary, which one is to be used, then the number of index registers to be used in the machine will be
A. 3
B. 6
C. 5
D. 3
4.In a multiprocessor configuration,two co-processors are connected to the host 8086 processor. The two co-processor instruction sets
A. May be different
B. May overlap
C. Must be disjoint
D. May be different
5. A certain processor supports only the immediate and the direct addressing modes. Which of the following programming language features cannot be implemented on this processor ?
A. Pointers
B. Arrays
C. Records
D. Pointers
6.In the absolute addressing mode
A. Operand is inside the instruction
B. Address of the operand is outside the instruction
C. Register containing the address of the operand is speciied inside theinstruction
D. Operand is inside the instruction
7.The programmable interval timer is
A. 8251
B. 8250
C. 8253
D. 8251
8.Pseudo-instructions are
A. Assembler directives
B. Instructions in any program that have corresponding machine code instruction
C. Instruction in any program whose absence will not change the output for any input
D. Assembler directives
9.The number of instructions needed to add 'n' numbers and store the result in memory using only one address instructions is
A. n
B. n-1
C. n+1
D. n
10. The addressing mode used in the instruction PUSH B is
A. Direct
B. Register
C. Register indirect
D. Direct
11.The process of fetching and executing instructions,one at a time, in order of increasing addreses is called
A. Instruction execution
B. Straight line sequencing
C. Instruction fetch
D. Instruction execution
12. The CPU of a Computer takes instruction from the memory and executes them. This process is called
A. Load cycle
B. Time sequence
C. Fetch-execute cycle
D. Load cycle
13.What are constants in VHDL code?
A. Fixed numbers represented by a name
B. Fixed variables used in functions
C. Fixed number types
D. Fixed numbers represented by a name
14.Fast-look-ahead carry circuits found in most 4-bit full-adder circuits:
A. determine sign and magnitude
B. reduce propagation delay
C. add a 1 to complemented inputs
D. determine sign and magnitude
15.Adding in binary, a decimal 26 + 27 will produce a sum of:
A. 111010
B. 110110
C. 110101
D. 111010
16.How many basic binary subtraction operations are possible?
A. 4
B. 3
C. 2
D. 4
17. If [A] = 1011 1010, [B] = 0011 0110, and [C] = [A] • [B], what is [C 4..2] in decimal?
A. 1
B. 2
C. 3
D. 1
18.When performing subtraction by addition in the 2's-complement system:
A. the minuend and the subtrahend are both changed to the 2's-complement.
B. the minuend is changed to 2's-complement and the subtrahend is left in its original form.
C. the minuend is left in its original form and the subtrahend is changed to its 2's-complement.
D. the minuend and the subtrahend are both changed to the 2's-complement.
19.When 1100010 is divided by 0101, what is the decimal remainder?
A. 2
B. 3
C. 4
D. 2
20.One way to make a four-bit adder perform subtraction is by:
A. inverting the output.
B. inverting the carry-in.
C. inverting the B inputs.
D. inverting the output.
21.What is the most important operation in binary-coded decimal (BCD) arithmetic?
A. addition
B. subtraction
C. multiplication
D. addition
22. The range of positive numbers when using an eight-bit two's-complement system is:
A. 0 to 64
B. 0 to 100
C. 0 to 127
D. 0 to 64
23. What are the two types of basic adder circuits?
A. sum and carry
B. half-adder and full-adder
C. asynchronous and synchronous
D. sum and carry
24. If B[7..0] = 10100101, what is the value of B[6..2]?
A. 10100
B. 01001
C. 10010
D. 10100
25. How many inputs must a full-adder have?
A. 4
B. 2
C. 5
D. 4
26.Solve this binary problem: 01110010 – 01001000 =
A. 00011010
B. 00101010
C. 01110010
D. 00011010
27.What distinguishes the look-ahead-carry adder?
A. It is slower than the ripple-carry adder.
B. It is easier to implement logically than a full adder.
C. It is faster than a ripple-carry adder.
D. It is slower than the ripple-carry adder.
28.A multimedia file
A. is same as any other regular file
B. Must be accessed at specific rate
C. stored on remote server cannot be delivered to its client
D. is same as any other regular file
29. A multimedia file
A. is same as any other regular file
B. Must be accessed at specific rate
C. stored on remote server cannot be delivered to its client
D. is same as any other regular file
30. In which type of streaming multimedia file is delivered to the client, but not shared?
A. real-time streaming
B. progressive download
C. compression
D. real-time streaming
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