ISRO 2018: Digital Logic Booster Quiz- 1

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Question 1

Consider the following

• AZ=(A+B)'C'
• BZ= (A+B).BC
• CZ= (A+B).BC'
• DZ= ((A'+B)'.BC)'

Question 2

The logic circuit given below converts a binary code y₁, y₂, y₃ into

• AExcess-3 code.
• BNone of these.
• CBCD code.
• DHamming code.

Question 3

The circuit shown in the given figure is a

• Afull adder
• Bfull sub-tractor
• Cshift register
• Ddecade counter

Question 4

The characteristic equation of an SR flip-flop is given by

• A
• B
• C
• D

Question 5

Which logic gate is used to detect overflow in 2's complement arithmetic?

• AOR gate
• BAND gate
• CNAND gate
• DXOR gate

Question 6

What is the decimal value of the floating-point number C1D00000 (hexadecimal notation)? (Assume 32-bit, single precision floating point IEEE representation)

• A28
• B-15
• C-26
• D-28

Question 7

Ring counter is analogous to

• AToggle Switch
• BLatch
• Csorting
• DStepping Switch

Question 8

The TRAP is one of the interrupts available in lNTEL 8085. Which one of the following statements is true of TRAP?

• AIt is level triggered
• BIt is negative edge triggered
• CIt is the +ve edge triggered
• DIt is both +ve and -ve edges triggered

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