# Digital Circuits [GATE (Graduate Aptitude Test in Engineering) Electronics]: Questions 177 - 181 of 271

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## Question 177

Digital Circuits
Sample and Hold Circuits, ADCs and DACs

Appeared in Year: 2013 (UGC-NET)

### Question

Assertion-Reason▾

### Assertion(Ꭺ)

R-2R ladder type D/A converter has a higher speed of conversion than a weighted resistance D/A converter. (June)

### Reason(Ꭱ)

R – 2R ladder type converter uses a smaller number of components than the weighted resistance D/A converter.

### Choices

Choice (4)Response

a.

Both Ꭺ and Ꭱ are true and Ꭱ is the correct explanation of Ꭺ

b.

Ꭺ is false but Ꭱ is true

c.

Both Ꭺ and Ꭱ are true but Ꭱ is NOT the correct explanation of Ꭺ

d.

Ꭺ is true but Ꭱ is false

## Question 178

Digital Circuits
Boolean Algebra, Minimization of Functions

Appeared in Year: 2013 (UGC-NET)

### Question

MCQ▾

Which logic function has the output low only when both inputs are high? (June)

### Choices

Choice (4)Response

a.

OR

b.

NAND

c.

NOR

d.

AND

## Question 179

Digital Circuits
Architecture

Appeared in Year: 2013 (UGC-NET)

### Question

MCQ▾

1 K memory device contain (June)

### Choices

Choice (4)Response

a.

512 memory cells

b.

1064 memory cells

c.

640 memory cells

d.

1024 memory cells

## Question 180

Digital Circuits
Memory and I-O Interfacing

Appeared in Year: 2013 (UGC-NET)

### Question

MCQ▾

What is SIM? (June)

### Choices

Choice (4)Response

a.

b.

c.

d.

Start Instruction Mode

## Question 181

Digital Circuits
Architecture

Appeared in Year: 2013 (UGC-NET)

### Question

MCQ▾

In a 8085 microprocessor, the resistor which holds address of the next instruction to be fetched is

### Choices

Choice (4)Response

a.

Instructor Register

b.

Stack pointer

c.

Program counter

d.

Accumulator

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