KLA Software Development Engineer In Test (SDET) interview questions

Total 5 programs were asked . Not worried about the programing language , mainly concerntrated on the logic Count of repatitive charcters in a string . Compare two files and print the difference between both the files . Contact two int arrays without using the third array. int [] arr1 = {1,3,5,7} ; int [] arr2 = {2,4,6,8}; o/p = {1,2,3,4,5,6,7,8} what would be your approach when the client asks you to develop a framework ..? How do you select a framework..?