Answer:
Screen flickering is usually caused by an incompatible app or display driver. It could also be caused by a bad HDMI/VGA connection to the monitor.
Hope it helps ! :)
 
        
             
        
        
        
Answer:
Finding kth element is more efficient in a doubly-linked list when compared to a singly-linked list 
Explanation:
Assuming that  both lists have firs_t and last_ pointers.
For a singly-linked list ; when locating a kth element, you have iterate through a number of k-1 elements which means that locating an element will be done only in one ( 1 ) direction
For a Doubly-linked list : To locate the Kth element can be done from two ( directions ) i.e. if the Kth element can found either by traversing the number of elements before it or after it . This makes finding the Kth element faster because the shortest route can be taken. 
<em>Finding kth element is more efficient in a doubly-linked list when compared to a singly-linked list </em>
 
        
             
        
        
        
Answer:
Transport layer:
- data packets are segment to smaller chunks.
- gives sequence number to segment.
- identifies the source and destination port number.
- initiates data transmission between nodes.
- rearrange and identifies the application, the transmitted data is meant for.
Explanation:
The transport layer is the fourth layer in the OSI network model. Protocols like TCP and UDP are found in this layer. It segment data packets and for a connection oriented protocol like TCP, it creates an established session between source and destination host (the session layer can also do this, but it is more defined in the transport layer).
The network and data-link layer can also transmit data packets.