Digital Assistants Mock Tests

Grama Sachivalayam – Digital Assistant recruitment exam was held in 2019. The 2nd notification for Digital assistants posts was issued in January 2020. Following are questions and answers from the previous paper – 2019 of panchayat secretary – digital assistants. Candidates can avail more questions covering entire syllabus from our mock tests. See details below:

Digital Assistants Online Exams / Mock Tests

Previous Questions of Digital Assistants 2019:

A full binary tree with 2n+1 nodes contains

1. n leaf nodes
2. n non-leaf nodes
3. n-1 leaf nodes
4. n-1n non – leaf nodes
   ANSWER: 1

The total number of different trees that are possible with six nodes is

1. 64
2. 4
3. 58
4. 12
   ANSWER: 3

Convert the expression (AB) – (CD) / ((F+G) – H)) to equivalent prefix notation.

1. -*AB / *CD – + FGH
2. *-AB / *CD +- FGH
3. –AB / CD – + FGH
4. -*AB / *CD +- FGH
   ANSWER: 1

The common method used to store a graph is

1. digraph
2. stack
3. adjacency matrix
4. linked list
   ANSWER: 3

Consider the following program segment
i = 6720, j = 4
while (i%j) = = 0)
{
i = i / j ;
j = j + 1
}
On termination j will have the value

1. 4
2. 8
3. 9
4. 6720
   ANSWER: 1

What will be the output of the following C code?

include main ( ) {

printf (“% . of”, 2.89);
}

1. 2.890000
2. 2.89
3. 2
4. 3
   ANSWER: 2

Grama / Ward Sachivalayam Online Exams / Mock Tests for All posts – See Details

Which type of function among the following shows polymorphism?

1. inline function
2. virtual function
3. undefined funcion
4. class member functions
   ANSWER: 4

Select emp_name from department where dept_name LIKE __ Computer Science; which one of the following has to be included in the blank to select the dept_name which has computer science as its ending string?

1. %
2. –
3. ll
4. $
   ANSWER: 4

The number of attributes in a relation is called as its

1. cardinality
2. degree
3. tuples
4. entity
   ANSWER: 4

Start and Stop bits are used in serial communication for

1. Errod detection
2. Error correction
3. Synchronization
4. Slowing down the communication
   ANSWER: 3

How many IP addresses are available to a company with a class B address

1. 8192
2. 16384
3. 32768
4. 65536
   ANSWER: 3

__ layer of OSI model is responsible for the process to process delivery of the entire message.

1. data link layer
2. network layer
3. transport layer
4. session layer
   ANSWER: 4

A cathode ray tube converts

1. voltage into current
2. AC voltage into DC voltage
3. DC voltage into AC voltage
4. Electrical signals into visual signals
   ANSWER: 2

Figure of merit of a receiver is given as

1. (SNR)o / (SNR)i
2. (SNR)i / (SNR)o
3. (SNR)i (SNR)o
4. None of the above
   ANSWER: 3

Mixing is used in communication to

1. raise the carrier frequency
2. lower the carrier frequency
3. alter the deviation
4. change the carrier frequency to any required value
   ANSWER: 1

What device is used to demodulate a time division multiplexed analog wave?

1. high pass filter
2. low pass filter
3. band stop filter
4. band pass filter
   ANSWER: 4

Which of the following is not an advantage of digital modulation?

1. greater noise immunity
2. greater security
3. easier multiplexing
4. less band width requirement
   ANSWER: 1

The most commonly used connections for power systems as step up and step down transformers are

1. star – delta, star – star
2. delta – star, star – delta
3. star – star, delta – delta
4. star – delta, delta – star
   ANSWER: 3

In general daily applications, the electrical fan operates with a —— inductor motor.

1. single phase
2. two phase
3. three phase
4. poly phase
   ANSWER: 1

Synchronous motors are generally not self starting as

1. the direction of rotation is not fixed
2. the direction of instantaneous torque reverses after half cycle
3. the starters cannot be used on these machines
4. starting winding is not provided on these machines
   ANSWER: 4