Regression testing is primarily related to
(A) Functional testing
(B) Development testing
(C) Data flow testing
(D) Maintenance testing

Consider a 32-bit processor which supports 70 instructions. Each instruction is 32 bit long and has 4 fields namely opcode, two register identifiers and an immediate operand of unsigned integer type. Maximum value of the immediate operand that can be supported by the processor is 8191. How many registers the processor has ?
(A) 32
(B) 64
(C) 128
(D) 16

What is the availability of the software with following reliability figures.

Mean Time Between Failures (MTBF) is 20 daysMean Time To Repair (MTTR) is 20 hours 

(A) 90%
(B) 96%
(C) 24%
(D) 50%

A stack is implemented with an array of ‘A[0…N – 1]’ and a variable ‘pos’. The push and pop operations are defined by the following code.

push (x) A[pos] ← x pos ← pos – 1end pushpop ( ) pos ← pos + 1 return A[pos]end pop 

Which of the following will initialize an empty stack with capacity N for the above implementation ?
(A) pos ← –1
(B) pos ← 0
(C) pos ← 1
(D) pos ← N – 1

The following circuit compares two 2-bit binary numbers, X and Y represented by X1X0 and Y1Y0 respectively. (X0 and Y0 represent Least Significant Bits)

Under what condition Z will be 1 ?
(A) X > Y
(B) X < Y

(C) X = Y
(D) X! = Y

What is the defect rate for Six sigma ?
(A) 1.0 defect per million lines of code
(B) 1.4 defects per million lines of code
(C) 3.0 defects per million lines of code
(D) 3.4 defects per million lines of code

Given that

B(a) means “a is a bear”F(a) means “a is a fish” andE(a, b) means “a eats b” 

Then what is the best meaning of

∀x[F(x) ⇒ ∀y(E(y, x) ⇒ B(y))] 

(A) Every fish is eaten by some bear
(B) Bears eat only fish
(C) Every bear eats fish
(D) Only bears eat fish

Following Multiplexer circuit is equivalent to

(A) Sum equation of full adder
(B) Carry equation of full adder
(C) Borrow equation for full subtractor
(D) Difference equation of a full subtractor

Statements associated with registers of a CPU are given. Identify the false statement.
(A) The program counter holds the memory address of the instruction in execution.
(B) Only opcode is transferred to the control unit.
(C) An instruction in the instruction register consists of the opcode and the operand.
(D) The value of the program counter is incremented by 1 once its value has been read
to the memory address register.

In a 8-bit ripple carry adder using identical full adders, each full adder takes 34 ns for computing sum. If the time taken for 8-bit addition is 90 ns, find time taken by each full adder to find carry.
(A) 6 ns
(B) 7 ns
(C) 10 ns
(D) 8 ns