// qdd on Feb 20, 2023

#ifdef qdd
#include <ringo>
#else
#include <bits/stdc++.h>
#define dbg(...)
#define dbgr(x, y)
#endif

using namespace std;

using ll = long long;

template <class T>
istream& operator>>(istream& is, vector<T>& v) {
  for (T& x : v) is >> x;
  return is;
}

template <class T>
ostream& operator<<(ostream& os, const vector<T>& v) {
  bool f = 0;
  for (const T& x : v) (f ? os << ' ' : os) << x, f = 1;
  return os;
}

void say(bool tag) { cout << (tag ? "YES\n" : "NO\n"); }

void sol() {
  int n;
  cin >> n;
  vector<int> a(n);
  cin >> a;
  int xor_all = 0;
  for (int i = 0; i < n; i++) {
    xor_all ^= a[i];
  }
  if (xor_all != 0) {
    cout << "YES\n2\n";
    cout << 1 << ' ' << 1 << '\n' << 2 << ' ' << n << '\n';
    return;
  }
  int L = a[0];
  for (int i = 1; i < n - 1; i++) {
    if (L != xor_all) {
      int M = a[i];
      int R = xor_all ^ L ^ M;
      for (int j = i + 1; j < n; j++) {
        if (L != M && L != R && M != R) {
          cout << "YES\n3\n";
          cout << 1 << ' ' << j << '\n';
          cout << j + 1 << ' ' << j + 1 << '\n';
          cout << j + 2 << ' ' << n << '\n';
          return;
        }
        M ^= a[j];
        R ^= a[j];
      }
    }
  }
  cout << "NO\n";
}

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  int T;
  cin >> T;
  while (T--) {
    sol();
  }
  return 0;
}